1.2L led traffic light PCB; 2.good quality,reasonable price; 3.quicker delivery ... Mask Pad no Open soldermask must cover all on both side, reject tin on pad Pad Open reject soldermask inside the hole ... gold 0.2-0.5umPealable maskcover all on pad,thickness≥0.20mmCarbon Inkcover all on trace,Value≤30Ω Outline Outline Tolerance± ... Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! led traffic light pcb